(Damascus, OR)  --  Oregon state troopers say a pedestrian who was killed in a crash in Clackamas County was a transient.  Authorities say 39-year-old Curtis Allen Thomas died at the scene of the Wednesday crash on Oregon 224 south of Damascus.  The driver called 911 and cooperated with police.  Troopers told "The Oregonian" that Thomas was wearing dark clothing while walking in an area that doesn't have street lights.